Reading currencies from text file - how to highlight selection?

I would be really greatful if someone could point me in the right direction. So far I have a program which reads in a series of currencies from a text file. The user inputs a number 1 to 9 and this corresponds to a particular rate in the text file i.e. 1 =British pound etc. I was wondering if it is at all possible to highlight the users selection i.e. if they input 1 highlight the text British Pound, input 2 highlight the text Euro. Any suggestions would be much appreciated. I presume it would go in either one of these functions but im not entirely sure.[CODE]void convert(void){